ProxyDroid

ProxyDroid is an app that can help you to set the proxy (http / socks4 / socks5) on your android devices.
PLEASE ROOT YOUR DEVICES FIRST
TIPS: Press MENU button to find a "Recover" option that would help you to recover / reset the proxy settings when you get something wrong.
** FEATURES **
1. Support HTTP / HTTPS / SOCKS4 / SOCKS5 proxy
2. Support basic / NTLM / NTLMv2 authentication methods
3. Individual proxy for only one or several apps
4. Multiple profiles support
5. Bind configuration to WIFI's SSID / Mobile Network (2G / 3G)
6. Widgets for quickly switching on/off proxy
7. Low battery and memory consumption (written in C and compiled as native binary)
8. Bypass custom IP address
9. DNS proxy for guys behind the firewall that disallows to resolve external addresses
10. PAC file support